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What happens when :
(a) silver chloride is kept in sunlight ?
(b) lead nitrate solution is added to potassium iodide solution?
(c) food materials containing fats and oils are left for a long time?
(a) silver chloride is kept in sunlight ?
(b) lead nitrate solution is added to potassium iodide solution?
(c) food materials containing fats and oils are left for a long time?
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(a)Silver chloride decomposes to form silver / white silver chloride turns grey in sunlight / (1 Mark)
$\ce{2AgCl ->[Sunlight] 2Ag + Cl2}$
(b)A precipitate of lead (II) iodide is formed / yellow ppt of lead iodide is formed / (1 Mark)
$\ce{2Pb(NO3)2(s) ->[heat] 2PbO(s) + 4NO2(g) + O2(g)}$
Lead nitrate Colourless Lead monoxide Yellow Nitrogen dioxide Reddish brown Oxygen
(c)Fats and oils are oxidized, they become rancid, and their smell and taste change. (1 Mark)
$\ce{2AgCl ->[Sunlight] 2Ag + Cl2}$
(b)A precipitate of lead (II) iodide is formed / yellow ppt of lead iodide is formed / (1 Mark)
$\ce{2Pb(NO3)2(s) ->[heat] 2PbO(s) + 4NO2(g) + O2(g)}$
Lead nitrate Colourless Lead monoxide Yellow Nitrogen dioxide Reddish brown Oxygen
(c)Fats and oils are oxidized, they become rancid, and their smell and taste change. (1 Mark)